Full Content is available to subscribers

Subscribe/Learn More  >

Electrohydrodynamically (EHD) Augmented External Condensation for R-134a in a Tube Bundle Heat Exchanger

[+] Author Affiliations
J. Wu, M. M. Ohadi, S. Thorpe, J. Qi

University of Maryland, College Park, MD

Paper No. IMECE2003-42351, pp. 123-128; 6 pages
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 4
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3718-1 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME


Electro-hydrodynamic (EHD) enhancement of external condensation of refrigerant R-134a for a seven-tube bundle heat exchanger was studied experimentally. The tubes used in the bundle were commercially available, state of the art enhanced tubes provided by a heat transfer tube manufacturer. Both horizontal and vertical bundle configurations were tested at different heat flux levels, ranging from 10 to 30 kW/m2 . The saturation temperature was 30 °C and the applied electric field voltage ranged from 0 to 20 kV. The results obtained indicated that the external heat transfer coefficients increased with increase in the applied electric field, and that EHD had a more significant influence for the vertical bundle orientation. A maximum of nearly fourfold enhancement was achieved for the vertical configuration, compared to a maximum enhancement of 38% for the horizontal configuration. The EHD technique is accordingly more efficient for heat transfer augmentation in vertical condenser orientations where the base line (non EHD enhanced) heat transfer are rather poor.

Copyright © 2003 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In